Grinding-wheel guard.



W. STONE. GRINDING WHEEL GUARD. APPLICATION FILED 1330.3, 1909.

Patented Mar. 29, 1910.

ANDREW B. QMKAM o0 PHDTO-LITHOGRAPHERS, WASHINGTOh. no.

rinrrnn s'rarns Parana onnreii.

WILLIAM STONE, OF MILWAUKEE, WISCONSIN.

GRINDINGWHEEL GUARD.

Application filed December 3, 1909.

To all whom it may concern:

Be it known that I, WILLIAM STONE, a citizen of the United States, andresident of Milwaukee, in the county of Milwaukee and State ofWVisconsin, have invented certain new and useful Improvements inGrinding- Wheel Guards; and I do hereby declare that the following is afull, clear, and exact description thereof.

My invention consists in what is herein particularly set forth withreference to the accompanying drawings and pointed out in claims, itsobject being to provide simple, economical and eflicient guards by whichto partially inclose grinding-wheels and prevent fiying of fragments ofsame in case of fracture; provision being had for varying the area of aperipheral front opening of each guard, and for adjusting said guard tocompensate for wear of the wheel within its confines.

Figure 1 of the drawings represents a sectional view on different planesindicated by lines 11 in Fig. 2, and illustrates the application of aguard in accordance with my invention with respect to a grinding-wheel.Fig. 2 of said drawings represents a hubside elevation of the guard inuse, parts in the showing being in section on the plane indicated byline 22 in Fig. 1, and other parts broken.

Referring by numerals to the drawings, 3 indicates a bearing for thearbor a of a grinding-wheel 5 that is held rigid on said arbor between apermanent flange 6 and a removable flange 7 of same. Clamped upon thepreferably shouldered outer end of the bearing 3 is a spacing-collar 8having the periphery thereof provided with an annular groove 9, saidcollar being made in sections joined together by clamp screws 10, asclearly illustrated in Fig. 2.

The diameter of the spacing-collar is equal to or greater than that ofthe arborflange 6, and slipped past said flange onto said collar is thehub 11 of a support, in the form of a two arm spider. A set-screw 12 isemployed to hold the spider-hub in rigid connection with the spacingcollar, said screw being engageable with the collargroove, and becauseof this groove said hub may be fastened at any point on said collar. Insome instances, the spacing-collar may be omitted and the spider-hubmade to have Specification of Letters Patent.

Patented Mar. 29, 1910.

Serial No. 531,197.

direct connection with the aforesaid arborbearing.

Engaging the ends of the arms 18 of the spider and horizontal slots 14,in opposite vertical side flanges 15 of a circular hood 16 are bolts 17having clamp-nuts 1S and setnuts 19 run on their screw-threaded outerends. Held by screws 20 in connection with the hood 16, opposite theflanges of same, is a recessed side plate 21, and a similar plateprovided with horizontal slots for the bolts 17 may be substituted forsaid flanges of said hood.

The grinding-wheel is within the confines of the hood and said hood isopen at the front to the periphery of said wheel. The side plate 21, ispreferably recessed, as herein shown, to afford access to the side ofthe grinding-wheel. To provide for regulating the area of the opening ofthe hood, a longitudinally slotted slide 22 is employed in connectionwith said hood, the slide being held in adjusted position by a set-screw23 engaging its slot and the aforesaid head. From time to timeincidental to Wearing down of the face of the grinding-wheel, the bolts17 are loosened, the hood moved rearward, a sufficient distance tocompensate for the wear, and the bolts again tightened. If thespacing-collar 8 be employed, the guard. as a whole may be readilyremoved, after removal of the grinding-wheel from its arbor, the bore ofthe spider-hub being of sufiicient diameter to clear the permanentflange of said arbor.

I claim:

1. The combination, of a support, means for rigidly securing the supportin connection with a bearing for the arbor of a grinding-wheel, a frontopen circular hood having horizontally slotted side flanges, boltsengaging said supports and the slots of said flanges, and nuts run onthe bolts to secure the hood in position to encompass said wheel.

2. The combination of a support, means for rigidly securing the same inconnection with a bearing for the arbor of a grindingwheel, an openfront circular hood in connection with the support to encompass saidwheel, and a recessed side plate in connection with the hood.

3. The combination of a support, means for securing the same inconnection with a bearing for the arbor of a grinding-Wheel, I havehereunto set my hand at Milwaukee an open front circular hood inconnection in the county of Milwaukee and State of With the support toencompass the Wheel, a IVisconsin in the presence of tWo Witnesses. 10recessed side plate attached to the hood, and WILLIAM STONE. 5 a slideadjustable on said hood to vary the IVitnesses:

area of the front opening of same. i FRANK OPPERMANN, In testimony thatI claim the foregoing 1 PAUL F. WENZEL.

